1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PERF_TARGET_H
3 #define _PERF_TARGET_H
4
5 #include <stdbool.h>
6 #include <sys/types.h>
7
8 struct target {
9 const char *pid;
10 const char *tid;
11 const char *cpu_list;
12 const char *uid_str;
13 const char *bpf_str;
14 uid_t uid;
15 bool system_wide;
16 bool uses_mmap;
17 bool default_per_cpu;
18 bool per_thread;
19 bool use_bpf;
20 bool hybrid;
21 int initial_delay;
22 const char *attr_map;
23 };
24
25 enum target_errno {
26 TARGET_ERRNO__SUCCESS = 0,
27
28 /*
29 * Choose an arbitrary negative big number not to clash with standard
30 * errno since SUS requires the errno has distinct positive values.
31 * See 'Issue 6' in the link below.
32 *
33 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
34 */
35 __TARGET_ERRNO__START = -10000,
36
37 /* for target__validate() */
38 TARGET_ERRNO__PID_OVERRIDE_CPU = __TARGET_ERRNO__START,
39 TARGET_ERRNO__PID_OVERRIDE_UID,
40 TARGET_ERRNO__UID_OVERRIDE_CPU,
41 TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
42 TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
43 TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
44 TARGET_ERRNO__BPF_OVERRIDE_CPU,
45 TARGET_ERRNO__BPF_OVERRIDE_PID,
46 TARGET_ERRNO__BPF_OVERRIDE_UID,
47 TARGET_ERRNO__BPF_OVERRIDE_THREAD,
48
49 /* for target__parse_uid() */
50 TARGET_ERRNO__INVALID_UID,
51 TARGET_ERRNO__USER_NOT_FOUND,
52
53 __TARGET_ERRNO__END,
54 };
55
56 enum target_errno target__validate(struct target *target);
57 enum target_errno target__parse_uid(struct target *target);
58
59 int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
60
target__has_task(struct target * target)61 static inline bool target__has_task(struct target *target)
62 {
63 return target->tid || target->pid || target->uid_str;
64 }
65
target__has_cpu(struct target * target)66 static inline bool target__has_cpu(struct target *target)
67 {
68 return target->system_wide || target->cpu_list;
69 }
70
target__none(struct target * target)71 static inline bool target__none(struct target *target)
72 {
73 return !target__has_task(target) && !target__has_cpu(target);
74 }
75
target__enable_on_exec(struct target * target)76 static inline bool target__enable_on_exec(struct target *target)
77 {
78 /*
79 * Normally enable_on_exec should be set if:
80 * 1) The tracee process is forked (not attaching to existed task or cpu).
81 * 2) And initial_delay is not configured.
82 * Otherwise, we enable tracee events manually.
83 */
84 return target__none(target) && !target->initial_delay;
85 }
86
target__has_per_thread(struct target * target)87 static inline bool target__has_per_thread(struct target *target)
88 {
89 return target->system_wide && target->per_thread;
90 }
91
target__uses_dummy_map(struct target * target)92 static inline bool target__uses_dummy_map(struct target *target)
93 {
94 bool use_dummy = false;
95
96 if (target->default_per_cpu)
97 use_dummy = target->per_thread ? true : false;
98 else if (target__has_task(target) ||
99 (!target__has_cpu(target) && !target->uses_mmap))
100 use_dummy = true;
101 else if (target__has_per_thread(target))
102 use_dummy = true;
103
104 return use_dummy;
105 }
106
107 #endif /* _PERF_TARGET_H */
108